Dear Abby: I'm a disabled middle-aged woman, married for 15 years. From the beginning, there was never much passion between my husband and me, but we're friends. I'm now becoming less able to go out and do things, and I will eventually be in a wheelchair. I want to leave him so he can find someone who is able to do things with him. I actually did it at one point. I moved into a cheap mobile home, but he sold the house and followed me. He's a loving husband, but he is messy. I exhaust myself...